Process for treating gravel



-- April 9, 1935. w. H. ALLSWEDE 1,997,031

PROCESS FOR TREATING GRAVEL Original Filed Aug. 1, 1950 2 Sheets-Sheet 1 I ATTORNEKS April 9, 1935. w. H. ALLSWEDE PROCESS FORTREATING GRAVEL Original Filed Aug. 1, 1930 2 Sheets-Sheet 2 INVENTOR. /4 ////'0/r7 /7//6l//6/6 ATTORNEYS Patented Apr. 9, 1

UNITED STATES PATENT This invention relates 1,997,031 PROCESS FOR TREATING GRAYEL William H. -.Allswede, Hersey, Mich.

Original application August 1,

Divided and this 19, 1934, Serial No. 721,268

Claims.

to an improve-5. process for treating gravel to eliminate rotten stone, hard clay and the like. of my co-pendin The g application for Patent application is a division Ser. No.

5 472,376 filed August 1, 1930.

The objects of the invention are:

First to eliminate h stone, agglomerates and Second, to provide a treating gravel as it is fe jectionable material.

Objects pertaining to detail construction and operati description to follow. drawings, which shows a ard clay lumps, rotten the like from gravel.

continuous process for d to eliminate the obs and economies of on will appear from the In the accompanying n apparatus suitable for carrying out my invention,

Fig. 1 is a detail elevational view partially in section on line I-I of Figs.

Fig. 2 is an enlarged rear end elevation 2, 3 and 4.

taken from the left hand of Fig. l.

Fig. 3 is an enlarged detail cross sectional view on line 3-3 of Fig. 1, tumbling barrel means.

showing details of the Fig. 4 is a similar detail cross sectional view on section line 44 of rinsing screen part.

Fig. 5 is a detail persp liner sections.

Fig. 1, through the gravel ective view of one of the Fig. 6 is a detail sectional view on line 6-6 of Fig. 5 showing detail s of construction.

The parts will be identified by their numerals of reference which are the same in all the. views. I is a cylindrical drum of the ball mill barrel, preferably 48 to 72 inches in diameter and of corresponding length as is supported at an inch illustrated. In practice it nation of one and onehalf inches to the foot, the higher end being the feed end and the lower end. 2 is a cylindrical gravel screen of like diameter to ,to the discharge end thereof gravel after it has been scrubbe propriate screen slots to secure of gravel required. surround the same, I:

end being the discharge rinsing and grading the said drum I, secured for screening the d. It contains apthe grade and size 3 are bearing rings which we being shown in the structure. These are supported on pairs of .rollers 4,

the rollers on each side being carried on shafts II which are supported in suitable bearings 42, 42

on a base 5. Gear ring venient point along the 6 is provided at a conlength of the drum I to drive-the same by suitable pinion ina well known manner. The pinion an d driving means are not shown, as my invention does not pertain thereto.

The feed end of my im the plate I which has a proved drum is closed by central circular opening 1930, Serial II for the intake of material.

the barrel is divided into compar rings 8, seen particularly in Fig. shown at the extreme end of said plates 8 are secured conical set of about the proportion. shown, which conic OFFICE application April The interior of tments by plate 1, a plate being drum. To these ubbingscreens 9 5 screens contain round holes one and threefourths inches in diameter or larger so as to Pass the material to half inch apart.

be scrubbed, and about one- The gravel introduced is 10 screened for size so that all large pieces are eliminated. The inner ends of the screens 9 are closed by removable caps 9| to facilit permit introduction compartment of the drum plates III which carry inch ate repair and to of the steel balls 92. Each is lined with steel square longitudinal bars I I which are riveted thereto, said lining being detachably secured newed when worn.

Within the compartment I place a so that it can be readily requantity of steel balls 92 of such size that they will not pass through the ape balls in practice are in diameter.

rtures in the screens 9. These steel about two to four inches e, cast iron balls or round er to the rinsing My improved mill is very e length ofscrubber with However, its action is greatly enhanced by a plurality and in practice I have used four ordinarily, as illustrated in the drawings. In the operation, gravel, cont clay and rotten ston material, is introdu aining impurities such as e and other hard stratified ced into the drum at II by any suitable means, as by chute or belt conveyor. A quantity of water is introduced at the same time by hose or otherwise, enough to reduce the mass to a muddy consistency. The machine is then revolved terial to stratify in the agitating bars I I and the steel balls permit them to tumble action which quickly disintegrates all clay a all tendency of the mathe drum being obviated by which carry the material together up at the side and down with a crushing rotten stone or like impurities within. the mass of gravel and does not in any way grind the gravel. It is not the intent to grind the gravel.

-As soon as the machine supply of the gravelly is started, a continuous material to be treated is fed into the drum with the necessary water to secure the muddy consistency and the action, the same being continuous after the start.

Owing to the incl me of the drum this muddy material with the the conical screen 9 and then, owing to the large size of the perforations therein, the material is at once passed and crushed through to the next compartment where the operation is repeated and is repeated a suflicient number oi! times to disintegrate the rotten stone or clay.

When this is accomplished the whole mass of the material is discharged onto the gravel rinsing and grading screen 2 where the rinsing takes.

place. The disintegrated clay and rotten stone is at once washed away and the gravel is passed to a suitable bin or other point or discharge completely prepared for use and all objectionable material removed. v

Having thus described my invention, what I claim as new and desire to secure by Letters Pat ent is:

l. The continuous process of treating gravel to remove objectionable material such as rotten stone, hard clay lumps or the like, comprising moistening the gravel containing such objectionable material until it has a muddy consistency, feeding the gravel continuously, mixing with the gravel disintegrating elements larger than the gravel, agitating the mixed gravel and disintegrating elements until the objectionable material and not the gravel is disintegrated. and while thus agitating the mixture screening out the disintegrating elements and separating the gravel from the disintegrated objectionable material.

2. The continuous process oi treating gravel to remove objectionable material such as rotten stone, hard clay lumps or the like, comprising, feeding the gravel continuously, mixing with the gravel disintegrating elements larger than the gravel, agitating the mixed gravel and disintegrating elements until the objectionable material tumbling balls passes up into and not the gravel is disintegrated, and while thus agitating the mixture screening out the dis-- integrating elements and separating the gravel from the disintegrated objectionable material.

3. The process of treating gravel to remove objectionable material such asrotten stone, hard clay lumps or the like, comprising moistening the gravel containing such objectionable material until it has a muddy consistency, mixing with the gravel disintegrating elements larger than the gravel, agitating the mixed gravel and disintegrating elements until the objectionable material and not the gravel is disintegrated, and while thus agitating the mixture screening out the disintegrating elements and separating the gravel from the disintegrated objectionable material.

4. The process of treating gravel to remove objectionable material such as rotten stone, hard clay lumps or the like, comprising mixing with the gravel disintegrating elements larger than the gravel, agitating the mixed gravel and disintegrating elements until the objectionable material and not the gravel is disintegrated, and while thus agitating the mixture screening out the disintegrating elements and separating the gravel from the disintegrated objectionable material.

5. The process of treating gravel to remove objectionable material such as rotten stone, hard clay lumps or the like, comprising mixing with the gravel disintegrating elements, agitating the mixed gravel and disintegrating elements until the objectionable material and not the gravel is disintegrated, and removing from the gravel the disintegrating elements and separating the gravel from the disintegrated objectionable material.

- WILLIAM H. ALLSWEDE. 

